1) a ship is being pulled by two locomotives through a 1.89km canal. The tension in each cable is 7.07 x 10^3 N and angle between the cable and the horizontal line is 27.0 degrees. What is the work done, in kj, on the boat by the locomotives?2) see picture below

A roller coaster starting at point A, the heights point, at a height of 35.9 m from the ground level, the moves to point B, the ground level and then goes up at point C at a height of 22.3 m and then slows down at point D that is 14.8 m from the ground level. Through the roller coaster there is no friction, but when it reaches point D there is a horizontal platform of length 16.3 m that has friction that causes the roller coaster to stop. How much acceleration from friction is required to stop the roller coaster along this length, assuming it has a speed of 1.72 m/s at point A? Record your answer to two digits after the decimal point. No units